OAuth for MyProxy

This is an adapted version of NCSA's OA4MP adding among others a /getproxy endpoint.

It requires the also adapted version of the security-lib.

Both are requirements for the RCauth.eu codebase, including the RCauth Delegation Server, MasterPortal, demo VO-portal and SSH Key portal.

Prerequisites

Java 8+ (OpenJDK 8 and 10 are both supported for building)
Maven 3.5+

Compiling and installing

Compile and install the adapted version of the security-lib dependency.
Check out the right RCauth-based branch, see the different RCauth components for the required versions.
For example:
```
 git checkout v4.2-RCauth-1.2
```
Make sure to use the same branch or tag for the OA4MP and security-lib components !!
Compile and install the OA4MP itself
```
 mvn clean package install
```

Docs

http://grid.ncsa.illinois.edu/myproxy/oauth/

Background and further reading

https://wiki.nikhef.nl/grid/RCauth.eu_and_MasterPortal_documentation